Added test of ranged for loop with an undeclared loop variable. Closes #333

src/test/java/dk/camelot64/kickc/test/TestPrograms.java

@@ -3373,6 +3373,11 @@ public class TestPrograms {
       compileAndCompare("examples/multiplexer/simple-multiplexer.c", 10);
    }
 
+   @Test
+   public void testForRangedNpe() throws IOException, URISyntaxException {
+      assertError("forranged-npe.c", "Error! Loop variable not declared i");
+   }
+
    @Test
    public void testForRangedWords() throws IOException, URISyntaxException {
       compileAndCompare("forrangedwords.c");

src/test/kc/forranged-npe.c

@@ -0,0 +1,14 @@
+// Range-loop without loop variable declaration causes NPE
+// https://gitlab.com/camelot/kickc/-/issues/333
+
+char * line = 0x0400;
+
+void main() {
+    clear_line(line);
+    clear_line(line+40);
+}
+
+void clear_line(byte *line) {
+    for (i: 0..39)
+        line[i] = 0;
+}